<p>PHOENIX (AP) — The American Civil Liberties Union is seeking a federal government probe into allegations of constitutional rights violations by U.S. Border Patrol agents in Arizona.</p><p>In a letter sent Thursday to the Department of Homeland Security, the ACLU cites five cases in which the group says U.S. citizens were subject to illegal searches, detentions and excessive force.</p><p>The group is asking for an investigation into the individual complaints as well as a comprehensive review of Border Patrol policies.</p><p>The complaint comes two weeks after the federal government settled an ACLU lawsuit filed over similar allegations in Washington state.</p><p>While admitting no wrongdoing in that case, Border Patrol agreed to retrain agents, among other things.</p><p>Border Patrol officials were not available for comment due to the partial federal government shutdown.</p>